Why doesn't Groove music show the titles of songs previously downloaded from my CDs?

[Windows Central Question]

why doesn't Groove music show the titles of songs previously downloaded from my CDs?

I have hundreds of songs previously ripped from my cd collection to my computer in windows 7 using WMPlayer. Groove doesn't show the song name, has RIFFINFO-INAM as the name and RIFFINFO - ART as the artist. How am supposed to figure out my music. every song has the same name.